Mustikkapiirakka (Blueberry Tart)

For the pastry:

• 2/3 cup butter, softened
• 1 egg
• 1/4 cup milk
• 1 1/2 cups flour
• 1 tsp ground cardamom seeds

For the filling:

• 4 cups blueberries
• 1 cup sugar
• juice of 1/2 lemon
• 1 tbsp cornstarch

Directions:

1. To make the pastry, mix the butter, egg, milk flour and cardamom together until you have a dough. Cover and chill in the refrigerator for about an hour. Meanwhile, mix the blueberries with the sugar, lemon juice and cornstarch.
2. Preheat your oven to 375 degrees. On a wax paper-lined backing sheet, roll the dough out thinly into an oval or circular shape. Spread the blueberry mixture over the dough, leaving about one inch of bare dough around the edges. Roll up the edges of the dough so you get a nice rim around the outside.
3. Bake for 30 minutes, or until the pastry is golden.